Java and Python Developer

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

We are seeking a proactive, detail-oriented Software Development Engineer (C10) with strong hands-on development expertise in both Python and Java. In this role, you will be part of a collaborative, high-impact engineering team responsible for designing, developing, and enhancing scalable backend services, data pipelines, and microservices supporting mission-critical enterprise platforms.

As a C10 Applications Development Analyst, you will work across the full Software Development Life Cycle (SDLC) under Agile methodologies—participating in requirement analysis, system architecture discussions, hands-on coding, automated testing, code reviews, and production support.

Key Responsibilities

Software Design & Development

Develop, maintain, and enhance robust, scalable backend applications using Java (Spring Boot / Core Java) and Python (FastAPI / Flask / Django / Scripting / Data Processing).

Build clean, secure RESTful APIs, microservices, and asynchronous event-driven integrations (e.g., Apache Kafka, RabbitMQ, or JMS).

Optimize application performance, throughput, memory management, and database query execution.

Quality Assurance & Engineering Best Practices

Write clean, modular, and maintainable code adhering to enterprise coding standards and SOLID principles.

Develop comprehensive automated unit, integration, and component tests using frameworks such as JUnit, Mockito, PyTest, or Unittest.

Maintain high code coverage and resolve static code analysis findings (e.g., SonarQube, security vulnerabilities).

CI/CD & DevOps Automation

Integrate applications with modern CI/CD pipelines (e.g., GitHub Actions, Jenkins, Tekton, Harness).

Containerize services using Docker and support deployments onto container orchestration platforms (e.g., Kubernetes / Red Hat OpenShift).

Participate in environment setup, automated deployment validation, and release management.

Collaboration & Agile Delivery

Actively participate in Agile ceremonies including Sprint Planning, Daily Standups, Backlog Refinement, and Retrospectives.

Collaborate with business analysts, technical leads, UI/Frontend engineers, database administrators, and QA teams.

Conduct constructive peer code reviews and contribute to technical documentation (architecture diagrams, API specs in OpenAPI/Swagger).

Production Support & Operational Excellence

Assist in triage, root cause analysis (RCA), and remediation of Level 3 production issues.

Monitor application health and diagnostics using observability tools (e.g., Prometheus, Grafana, Splunk, OpenTelemetry).

Technical Qualifications & Skill Requirements

Core Programming & Frameworks

Python: Strong proficiency in Python 3.x, data structures, asynchronous programming, scripting, and web frameworks (FastAPI, Flask, or Django) or data manipulation libraries (Pandas, NumPy).

Java: Solid foundational knowledge of Java 11/17+, OOP design patterns, multithreading, concurrency, collections, and the Spring / Spring Boot ecosystem (Spring MVC, Spring Data, Spring Security).

API & Integration

Practical experience designing and implementing RESTful APIs with OpenAPI/Swagger specifications.

Familiarity with message brokers and streaming platforms (e.g., Kafka, ActiveMQ, or IBM MQ).

Databases & Persistence

Experience with relational databases (PostgreSQL, Oracle, SQL Server, or MySQL), including schema design, indexing, and complex SQL queries.

Exposure to ORM frameworks (Hibernate/JPA, SQLAlchemy) and/or NoSQL datastores (MongoDB, Redis, Elasticsearch).

DevOps, Cloud & Tooling

Hands-on experience with version control tools (Git / GitHub / Bitbucket).

Familiarity with build tools such as Maven / Gradle (Java) and pip / poetry / uv (Python).

Basic understanding of Docker, Kubernetes/OpenShift, and cloud fundamentals (AWS, GCP, or Azure).

Knowledge of automated testing frameworks (JUnit, PyTest) and CI/CD tools.

Educational Background & Experience

Education: Bachelor’s degree in Computer Science, Computer Engineering, Information Technology, or related quantitative field (or equivalent practical experience).

Experience: Approximately 2-4 years of professional software engineering experience with demonstrable proficiency in both Python and Java.

Certifications (Optional / Plus)

Oracle Certified Professional

Java Programmer

Cloud certifications (AWS Solutions Architect/Developer Associate, Google Cloud Certified)

Kubernetes certifications (CKAD)

Professional & Behavioral Competencies

Analytical Problem Solving

Strong critical thinking skills with an ability to debug complex issues across hybrid Java/Python architectures.

Communication: Clear verbal and written technical communication skills; comfortable articulating design trade-offs to both technical and non-technical stakeholders.

Teamwork & Ownership: Self-driven, collaborative mindset with an emphasis on accountability, continuous learning, and adaptability in a fast-paced environment.

Education

Bachelor’s degree/University degree or equivalent experience

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

Job Family Group

Technology

Job Family

Applications Development

Time Type

Full time

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any